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This is an if condition:

let grade = 5

if (grade >= 10) {
    console.log("This is a passing grade")
}
  • The if keyword allows us to run code conditionally based on a certain condition.
  • The condition inside the if will either be true or false.
  • When the condition inside the if results in true, the code between the curly braces will be executed.
  • When the condition inside the if results in false, the code between the curly braces will be skipped.
function getVotingMessage(age) {
    if (age >=18) {
        return "You are allowed to vote"
    }
}

//Sample usage
console.log(getVotingMessage(20))

Branching

Branching allows you to fork off your code into different pathing rather than just a top to bottom approach. This introduces an issue where some code might not run.

This tool helps visualize your code flow. https://bogdan-lyashenko.github.io/js-code-to-svg-flowchart/docs/live-editor/index.html

Chapter Recap

  • The if keyword allows us to run code conditionally based on a certain condition.
  • The condition inside the if will either be true or false.
  • The code between the curly braces will be executed when the condition inside the if results in true.
  • When the condition inside the if results in false, the code between the curly braces will be skipped.
  • if conditions allow us to do branching in our code.
  • The code inside the body of the if may or may not be executed depending on the condition of the if.